Mini Tools Collection
Useful one-page tools for real work
ToolPatch is a growing collection of focused utilities. Each page handles one task with clear inputs, fast results, and practical outputs.
Browse by Use Case
Quick filters
All categories
Business
Chemistry
Conversion Tools
Converters
Data
Data Visualization
Design & Branding
Developer
Developer Tools
Education
Engineering
Finance
Financial
Health & Fitness
HR & Hiring
Industrial
Legal Ops
Lifestyle
Marine & Navigation
Marketing
Math
Model Rocketry
Network
Operations
Personal
Physics
Productivity
Project Management
Solar & Power
Statistics
Text Tools
Writing & Content
Recent Tools
No recent tools yet.
Favorite Tools
Mark tools as favorites to pin them here.
Productivity
Date Difference Calculator
Calculate days and weeks between two dates.
Useful for planning timelines, deadlines, and scheduling windows.